Granted Patent
Utility
US 6,425,941 · App. 09/641,222
Oxidation resistant granular activated carbon
Inventor:
Robert G. Roodman
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Aug 17, 2000
Inventor
Robert G. Roodman
Assignee (at issue)
Envirotrol, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.